Stock bending and shaping device



March 17, 1936. F. SUH] 2,034,316

STOCK BENDING AND SHAPING DEVICE Filed June 4, 1935 2 Sheets-Sheet 1 I"rwentor March 17, 1936. F. SUHI 2,034,316

STOCK BENDING AND SHAPING DEVICE Filed June 4, 1935 2 Sheets-Sheet 2 Inuentm Patented Mar. 17, 1936 UNITED STATES PATEL 541T 7 Claims.

This invention relates to an especially designed and constructed devicefor bending and shaping metal stocks, and has reference in particular toa distinctively constructed means for converting rectilinear rods andcylindrical tubes into curvilinear formation for diversified usage.

Inkeeping with an urgent desire to provide a simple and economicalstructure for accomplishing the requisite results with expediency andefficiency I have found it practicable to adopt a duplex unit assemblyor structure wherein the units are disposed in superposed converserelationship and provided with properly arranged and coinciding bendingand shaping elements whose collective force, when brought together,

is reliable in forming compound curves of uniform and correspondingproportions to an extent not heretofore obtained by relativelycomplicated machinery now available.

I have discovered by providing this doubleacting assemblage andconstructing the units of substantially identical companion parts it ispossible to not only satisfactorily form the desired compound bends, butto regulate the shaping thereof to insure the formation of predetermineduniform undulations.

Aptly fitted for the purposes intended, I have devised a systematiccoordination of parts wherein each unit embodies a spring returnedadjustably mounted tiltable adapter block for stock holding'purposes,together with a shaping mandrel' or die, the blocks being disposed atthe outer ends of the respective units and the mandrels at the innerends so that they come together in proper matching relationship tosimultaneously coact in satisfactorily keeping the tube in place whilebending or shaping it around the forming mandrels.

The preferred embodiment of the invention is illustrated in theaccompanying pictorial drawings in which:

Figure 1 is what may be designated as a side elevational view of thedouble unit assembly with the units occupying their relative operativepositions before the bending operation is started.

Figure 2 is a view like Figure 1 showing how the units come together andform the bends or undulations between the parts forcibly pressed orclamped thereagainst. 5 Figure 3 is a longitudinal sectional View of thelower or relatively stationary unit, taken on line 3--3 of Figure 4.

Figure 4 is a top plan View thereof.

Figure 5 is a vertical or transverse section on the line 55 of Figure 4.v

By way of introduction to the detailed description, it is to be pointedout that the two complemental units denoted by the numerals 6 and 1 arevirtually duplicate in construction and While the same numerals mightwell be employed to designate the corresponding or identical parts it isbelieved desirable to represent them by distinguishing referencecharacters. It follows, therefore, that the relatively fixed unit6.00mprises a base plate 8 attachable to an appropriate collateralfoundation (not shown). Rising from one end of the base plate areflanges 9 disposed in spaced parallel order and of appropriate height.These are provided with selectively usable bearing holes it toaccommodate the pivot pin H for the tiltable anvil or block l2 disposedbetween said flanges. This block is of general rectangular form havingthe inner end thereof cut oif obliquely as at 3 to permit it to swingdown toward the plate 8 as illustrated in Figure 2. The upper edge isformed with a groove Id of appropriate depth to accommodate therectilinear pipe, tube, rod or the like indicated at Hi. This block isadjustably mounted between the flanges through the instrumentality ofthe pivot pin l l and the bearing holes It] as is evident. At theopposite end of the plate are similar upstanding flanges it ofappropriate shape between which is mounted a non-turnable roller IT.This is the die or mandrel for bending the pipe. It is provided with aperipheral groove it! which corresponds to the groove l 4. The mandrelis fastened between the flanges by way of an attaching pin l9 secured tosaid flanges/That part of the roller which contacts the base. plate 8 isflattened to retain the roller against rotation.

Referring now to the upper relatively movable unit I it will be observedthat this comprises a flat plate l9-a of proportions more or less equalto the plate 8, it being disposed in parallelism to said plate 8 andmovable toward and from the plate in a direction at right angles. Thisplate l9a carries an attaching stub shaft 20 which is connectible withthe source of power such as the press or punch machine (not shown).Depending from the right hand end of the plate are spaced parallelflanges 2! having selectively usable bearing openings or apertures 22 toaccommodate the pivot and attaching pin'23 of the tiltable clampingblock 24. This block corresponds in proportion and shape to the firstnamed block l2, having the same features l3 and I4. Both of these blocksare provided with headed pins 25 at the outer end and a coil spring 26is attached to this pin and to a similar headed pin 21 on the baseplate. This is a simple spring return means for normally maintaining theblock in a plane parallel to the plates and at the same time allowing it.to tilt to the requisite angle as shown in Figure 2. The flanges 28 onthe inner end of the plate l9a are like the flanges l6 and constructedto accommodate the mandrel .or roller 29. This is fastened in place bythe same sort of a pin [9 and provided with a marginal or peripheralgroove l8 to accommodate the pipe. Thus, it will be seen, that the twounits 6, and l are approximately duplicatein construction and aredisposed in superposed parallelism, the unit I being ofiset with respectto the unit 8 so that the parts come together in requisite interfittingrelationship as depicted in Figure 2. Or stated otherwise as the unit 1is forced down under proper force and pressure the two blocks I 2 and 24automatically swing 'to tilted parallelism, while the two mandrels I1and 2.9 move into close coacting proximity in "such away that the pipe lclamped between :the 'mandrels and blocks is formed into a compound orreverse bent curve. The coacting of :therforce of pressure on the pipeis such that the bends are substantially uniform in shape .andproportion. When the unit 1 is elevated -the3blocks I2 and 24 resumetheir normal horirzontal position.

it is believed :that a device of this type is :"characterized byappropriate cooperating im- .provements iso matched and inter-related asto permitithe results obtained thereby to tran- 'rscend in accuracy and.dependability though accomplished by far more complicated and expensivemachines. It is believed .therefore, that :the invention *fulfills therequirements of a simplified structure of the type claimed and f is"something which may itraderas an improvement.

:It zis thought that persons skilled in the art Ito which the inventionrelates will be able to :obtain a clear understanding of the inventionbe endorsed by the after considering the description in connectionswithith'e drawings. Therefore, a more lengthy -description is regardedas unnecessary.

Minor changes in shape, size and rearrange- .men't-"o'f details comingwithin the field of invention claimed may be resorted 'to in actualpractice, if desired.

Having thus described the invention, what is claimed as new is: r

1. Ina structural assemblage of the class described, in combination, arelatively fixed support, a circular mandrel mounted thereon andprovided with a peripheral stock receiving and retention "groove, anadjustably and tiltably fmountedholdingmember on said support prope'rlycoordinated in relation to said mandrel, :a "relatively movable unitindependent of said "first named unit and having a corresponding mandrelmovable in a line at right angles to said support to allow it toposition itself between the first named mandrel and tiltable -memb'er,said relatively movable unit being also "provided with a tiltable stockholding member bo'dily movable to a position outwardly of and in closeproximity to said first named mandrel.

2. In a structure of the class described, a support provided at one endwith upstanding spaced paralle'l apertured flanges, a substantially rec-:tangular' horizontally disposed block adjustably pivotally mountedbetween said flanges,

spring mean attached to the swingable end or the block and adjacent endof the plate for normally maintaining the block in a position parallelabove the plate, the inner end of the block being beveled, and means atthe opposite end of the plate for shaping and bending a pipe, tube orthe like.

3. As a component part of a structural assemblage of the classdescribed, a base plate provided at one end with upstanding spacedparallel apertured flanges, ,a spring returned rectangular blockadjustably and pivotally mounted between said flanges'and having itsinner end beveled to approach the plate when tilted, and having itsupper edge formed with a pipe reception and retention groove, said platebeing provided-at its opposite end with a non-rotatable peripherallygrooved roller.

4. In a stock bending and shaping structure of the class described, asupport provided at one end with a pair of upstanding spaced parallelflanges, said .flanges being :provided with Jon- .gitudinally spacedbearing Iholes, 'a horizontally disposed block mounted between"SflidififlhEGS, said block being :provided with a hinge fiplntleselectively disposable 'in'said 'bearingrholesgspring return meansconnected with the support and block, and normally maintaining theEblock :in a position parallel tothe.support,-1the inner end of'saidiblock being bevelled-to permit it to :swing toward and from thesup-port, amaddltionalpair of flanges on the support adjacent theopposite ends and spaced longitudinally from the Jflrst named flanges,and "a shaping mandrel mounted transversely on the support betweensaidlsecond named flanges and spaced longitudinally :from and disposedin a plane with'said block;

"5. In a device of the-class described, :a base provided at one end witha-tiltablespringreturned horizontally disposed longitudinally-elongatedblock formed. in its upper edge portion witha pipe receptionand retention groove, one end portion'of 'sald blockbeing'transversely"cuton an oblique line to :p'rovide a bevelled surface swingable intoclose proximity to \thebase when the body portion is tilted in :-adirection away from the base, and amelativelwfixedshaping mandrel onsaid base space-d rlongitudinally from and disposed inaplanewith :saidblock.

6. In {a stock bending andfshaping structure of -the class described, incombination, a-:relati-vel-y fixed support, a shaping rmandrelmountedrigidon 'said support, an adjustably and tiltably "mounted stockholding member on the support spaced longitudinally from said'mandrel;excomp'lemental relatively movable unit 'disposedina "plane above saidsupport and movable in a per- "pendicular line toward and .from thesupport, said unit being provided With a fixed shaping "mandrel locatedin a position to move'down between said first named mandrel and stockholding member, and an additional stock holding member carried by saidunit and constructed and arranged to :move downwardly to -a positionspaced outwardly of said first :named mandrel.

7. A stock bendingand shaping apparatus of the class describedcomprising a relatively fixed unit having self adapting stock holding-mean-s and a shaping mandrel, 'sald mandrel :being spacedlongitudinally from said stock holding means, and a relatively movable-um't :independent of the first named 'unit adapted-for cooperation withoperating "means and disposed in spaced parallelism above saidfirstnamedunit and movable at 'right' angles-toward and from said first named unit.inia substantially perpendicular line, said movable unit comprising asupport provided on its under side at one end with a spring returnedtiltably mounted stock engaging a holding block, said block beingpositioned in a direction outwardlyof and beyond said mandrel, and asecond mandrel corresponding in construction to the first named.

mandrel and spaced longitudinally from and in a plane with said blockand adapted to move, when in stock bending position, to a point betweenthe first named mandrel and stock holding means.

FRANK SUHI.

